Envelop construction



J. C. BLUE.

ENVELQP CONSTRUCTION.

APPLICATION FILED APR.7,1919.

1 ,335,8 1 4, Patented Apr. 6, 1920.

BJVENTQR John C fi/ue ATTORN EY WWW A par sar JOHN G. BLUE, OFBROOKYLN, NEW YORK.

ENVELOP CONSTRUCTION.

Application filed April 7, 1919.

more particularly, to that class thereof which are adapted to be sent through the mails substantially sealed, but the contents of which maybe readily withdrawn for inspection by the postal authoritieswithout necessitating thecutting or unsealing of the envelop. f

During the manufacture of open-ended envelops the side flaps are folded down, but

' left open, and theyare delivered to the user in this form; ,When an envelop is to be used the side-flap is folded up and the inclO- sure'inserted. If the inclosure is of the ordinary size it will slip into the envelop readily, and by the construction of my prior application will be automatically guided'into the fold of the end flap. However, if the 'inclosure is bulky its introduction into the envelop and into the fold of the end flap has a tendency to straighten out or unfold 30 said end flap and withdraw: it from the end openings The present invention is an improvement on the envelop of my co-pending application, Serial No. 282,583, filed March 14, 1919 and the object of the present invention is to provide an envelop which will possess all the advantages of my prior application, but

will have the further advantage of obviating the tendency of the end flap to become disengaged from the corresponding opening when bulky inclosures are introduced into the envelop.

p A further object of the invention is to provide an envelop embodyingthese advantageous features which may be economically manufactured through minimum waste of stock in cutting.

Features of the invention other than those specified will be apparent from the hereinafter detailed description taken in conjunction with the accompanying drawings.

In the accompanying drawings I have illustrated one practical embodiment of the,

invention, but the construction therein shown is to be understood as illustrative Specification of Letters Patent. Patented Apr. 6,1192%.

Serial No. 288,416.

only, and not as defining the limits of the invention.

Figure 1 is a back View of an envelop embodying the present invention, showing an inclosure partially introduced thereinto;

Fig. 2'is a back view of the envelop as it 1 appears in. the course of manufacture;

Fig. 8 is a development of the blank in which the envelop is folded;v

Fig. 4L is a perspective detail of one end of the envelop showing the end flap in open or withdrawn position; and,

Fig. 5 is a view similar to Fig. 4;, but illustrating the end flap folded and turned in.

Referring to the drawings, A; designates an envelop which is provided at one of its ends withan opening a. .The front'portion of the envelop is projected to'form a flap B adapted to be folded on theline b and secured by adhesive Z) to the back of the envelop. The front of the" envelop is. further provided at its end with an end flap C adapted to be folded and tucked" in the opening a for the purpose of receiving the adjacent end of an inclosure D in the fold of such end flap, tO'PIfGOlHdG said inclosure from falling out'of the" envelop when the flap B is folded and sealed. The back of the envelop is provided with a tongue E which is preferably formed integral with the back and is adapted to be folded interiorlv of the envelop to partake of a position its sides with an opening a, and at one of forwardly of the flap C and overlie the upper edge of said flap. From the lateral edge of the tongue E projects a supplemental tongue F, and said tongue F is provided with an adhesive 7 for securing it in place against the inner front wall of the envelop.

The tongue E may also be provided with adhesive e to secure it to the inner wall of the back of the envelop, thoughthis is not essential.

The envelop is preferably stamped up in the form of an integral blank as shown in Fig. 3 and during the process of manufacture is thereafter folded into the position shown in Fig. 2, the next step being the folding and tucking in of the end flap C, the

fold of the tongue E, and the pasting of the supplemental tongue F to the inner side of the front of the envelop so that the parts partake of the positions shown in Fig. 5. In this position the flap C is tucked in, the tongue E is folded to overlie the upper portion of the flap (l, and the supplemental flap F is adhesively secured to the front of the envelop. w

'Fig. 1 shows the device at the completion of its manufacturing operations, without, of course, the inclosure D which is subsequently introduced into the envelop by the .the user in this condition.

precludes bulky inclosures from so enlarg ing the end opening a. .as to cause the end flap C to be withdrawn therefrom.-

If the adhesive e is provided on'the tongue E to paste the tongue down, said tongue will form, in effect, pocket which will house the upper free endl'of the end flap to better hold it against inadvertent withdrawal. However, if it is desired by the postal authorities to inspect the contents of the envelop, the flap C may be readily withdrawn to the position shown in Fig. 4: after 'which the contents of the envelop may be slipped through the end opening a. After .re-insertion through the end opening, the flap C is again tucked in to partake of the normal position of Fig. 5.

. When the envelop is constructed after the manner shown in the drawings, each flap and tongue has its own inherent function, all c1"; which functions coordinate to produce an. envelop of maximum efficiency 7 and utility, The function of the tongue E is to overlie the end flap C for the purpose of guiding inclosures into the fold of the end flap during their insertion into the envelop. By. forming the supplemental tongue at the end of the 'main tongue and adhesively securing said supplemental tongue to the front of the envelop, it will be noted. that the main tongue is thus secured to the front of the envelop and this makes it impossible to insert the end,

flap C in any other position than that wheren the tongue E will overlie it. It is thus mpossible for the end flap C to be tucked lIl wrong, or the tongue E to be folded in any other position than that wherein it will overlie the end flap. VJ hen the supplemental flap is pasted in position it will notonly preclude the gapping of the end opening, but it will holdthe back of the. envelop adjacent its upper edge against sliding movement relative to the front of the envelop. Such sliding movement is usually in the fold of the end flap 0 while the supplemental tongue 'F holds the end opening a closed during the insertion of bulky inclosures. I r

In the commercial form of the envelop, the tongue E, supplemental tongue F, as well as the end flap C, may partake of different forms or configurations from those shown in the drawings, and may be made ornamental without departing from the spirit of the.

invention. The flap C may be made longer, wider, or narrower, and its proper operation is not dependent upon theadhesive e.-

Furthermore, while it is preferred that the envelop be made from a blank, it is within the scope of the invention to make the tongues, flaps or other parts separate, and

secure them together by an adhesive or otherwise to produce'the blank. 7

'It will be understood that structural and formal changes may bemade in the structure described, such as the substitution of equivalents, without departing from r'the spirit or substance of the invention, the scope of which is commensurate with the appended claims.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. An improved envelop provided with openings at one side and one end thereof, flaps formed on the front portionof the envelop adjacent the side and end openings folded and tucked into the end openings, a tongue formed on the back of the envelop and folded to a position therein to overlie the end flap and receive said end flap in the fold of the tongue whereby an inclosure upon insertion into the envelop, is guided by the tongue into the fold of the end flap, the side flap being thereafter folded and adhesively secured to the back of the envelop, and a supplemental tongue projecting from one lateral edge of the tongue and adhesively secured to the front of the envelop interiorly thereof, for the purpose of maintaining the end opening closed during the insertion of bulky inclosures.

2. An improved envelop provided with openings at one side and one end thereof,

thereof, the end flap being adapted to be i flaps at the corresponding side and end of the envelop, the end flap being adapted to be folded and tucked into the end opening, a tongue independent of the end flap and overlying said end flap adjacent the side opening for the purpose of guiding an inolosure during the insertion into the envelop to position said inclosure in the fold of the end flap, and a supplemental tongue, independent of the end flap and projecting from one lateral edge of the tongue, said supplemental tongue being adhesively secured to the interior of the front of the envelop for the purpose of holding the end opening closed until the side flap is folded down and sealed.

3. An improved envelop provided with openings at one side and one end thereof,

a flap adapted to be folded and adhesively secured to the envelop to close the side opening, another flap adapted to be folded into the end opening, a member independent of the end flap for guiding an inclosure during its insertion into the envelop before the side flap is folded and sealed, to cause said inclosure to be positioned in the fold of the end flap, and a tongue also independent of the end flap cooperating with said member and adhesively secured to the front Wall of the envelop for maintaining the end opening closed during the insertion of bulky inolosures.

In testimony whereof, I have signed my 4 name to this'specifioation.

JOHN G. BLUE. 

